Identification of a proliferation gene cluster associated with HPV E6/E7 expression level and viral DNA load in invasive cervical carcinoma

Oncogene. 2005 Oct 27;24(47):7094-104. doi: 10.1038/sj.onc.1208854.


Specific HPV DNA sequences are associated with more than 90% of invasive carcinomas of the uterine cervix. Viral E6 and E7 oncogenes are key mediators in cell transformation by disrupting TP53 and RB pathways. To investigate molecular mechanisms involved in the progression of invasive cervical carcinoma, we performed a gene expression study on cases selected according to viral and clinical parameters. Using Coupled Two-Way Clustering and Sorting Points Into Neighbourhoods methods, we identified a 'cervical cancer proliferation cluster' composed of 163 highly correlated transcripts. Most of these transcripts corresponded to E2F pathway genes controlling cell division or proliferation, whereas none was known as TP53 primary target. The average expression level of the genes of this cluster was higher in tumours with an early relapse than in tumours with a favourable course (P = 0.026). Moreover, we found that E6/E7 mRNA expression level was positively correlated with the expression level of the cluster genes and with viral DNA load. These findings suggest that HPV E6/E7 expression level plays a key role in the progression of invasive carcinoma of the uterine cervix via the deregulation of cellular genes controlling tumour cell proliferation. HPV expression level may thus provide a biological marker useful for prognosis assessment and specific therapy of the disease.

Publication types

  • Comparative Study
  • Research Support, Non-U.S. Gov't

MeSH terms

  • Adult
  • Aged
  • Cell Proliferation*
  • Cervix Uteri / metabolism
  • DNA, Viral / genetics*
  • DNA-Binding Proteins / genetics
  • DNA-Binding Proteins / metabolism*
  • Disease Progression
  • Female
  • Gene Expression Regulation, Neoplastic
  • Humans
  • Middle Aged
  • Multigene Family
  • Neoplasm Invasiveness / pathology*
  • Neoplasm Proteins / genetics
  • Neoplasm Proteins / metabolism
  • Oligonucleotide Array Sequence Analysis
  • Oncogene Proteins, Viral / genetics
  • Oncogene Proteins, Viral / metabolism*
  • Papillomaviridae / genetics
  • Papillomavirus Infections / genetics*
  • Papillomavirus Infections / metabolism
  • Papillomavirus Infections / virology
  • RNA, Neoplasm / genetics
  • RNA, Neoplasm / metabolism
  • Uterine Cervical Neoplasms / genetics*
  • Uterine Cervical Neoplasms / metabolism
  • Uterine Cervical Neoplasms / virology
  • Viral Load


  • DNA, Viral
  • DNA-Binding Proteins
  • E6 protein, Human papillomavirus type 18
  • E7 protein, Human papillomavirus type 18
  • Neoplasm Proteins
  • Oncogene Proteins, Viral
  • RNA, Neoplasm